<script type="text/javascript">
    function switchOverview() {
        var overviewName = $('#selectOverview').val();
        
        $.get('portal/ajaxOverview/'+overviewName, function(data) {
            $('#overview').html(data);
        });
    }
</script>
<select id="selectOverview" onChange="switchOverview()" >
    <option>-- Select an overview --</option>
    <option value="partner">Partner</option>
    <option value="person">Person</option>
    <option value="record">Record</option>
    <option value="backlink">Backlink</option>
    <option value="appointment">Appointment</option>
</select>
<div id="overview" >
    
</div>
